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experimental flight
 experimental flight
avia. 试验飞行
skydive. 试飞
| applications
 application
gen. 用途
interntl.trade. 申请书
met. 使用; 施加; 涂覆
oil 申请

to phrases
experimental flight
avia. 试验飞行
skydive. 试飞
tech. 飞行试验
experimental flight: 2 phrases in 1 subject
Aviation2